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15 Cards in this Set
- Front
- Back
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What is mass movement |
Downhill movement of material under the influence of gravity. Can be fast or slow. |
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Types of mass movement |
Soil creep Mudflows Landslide Rockfall Slumping Runoff Solifluction |
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Soil creep |
Very slow movement of soil particles downhill, precise movement due to soil being wet or frozen and moving down and then up again as it thaws. |
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Mudflows |
Involves earth and mud flowing downhill, occurs after heavy rainfall. Water gets trapped within rock, increasing pore water potential, forces rock particles apart and leads to slope failure. |
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Landslide |
Fast moving block of rock sliding down a hill under gravity - occurs after heavy rainfall or earthquakes. |
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Landslide |
Fast moving block of rock sliding down a hill under gravity - occurs after heavy rainfall or earthquakes. |
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Rockfall |
Collapse of rock fragments on vertical cliff face commonly resistant rock under mechanical weathering e.g freeze-thaw |
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Landslide |
Fast moving block of rock sliding down a hill under gravity - occurs after heavy rainfall or earthquakes. |
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Rockfall |
Collapse of rock fragments on vertical cliff face commonly resistant rock under mechanical weathering e.g freeze-thaw |
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Slumping |
Occurs in weak unconsolidated clays, with a permeable layer over an impermeable layer of rock which causes pore pressure build up and the land curves round. |
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Landslide |
Fast moving block of rock sliding down a hill under gravity - occurs after heavy rainfall or earthquakes. |
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Rockfall |
Collapse of rock fragments on vertical cliff face commonly resistant rock under mechanical weathering e.g freeze-thaw |
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Slumping |
Occurs in weak unconsolidated clays, with a permeable layer over an impermeable layer of rock which causes pore pressure build up and the land curves round. |
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Runoff |
Run off is the movement of water and sediment down a slope. Toxic chems contaminate storm water and cause a threat to coastal ecosystems. |
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Solifluction |
Occurs in cold periglacial environments in the summer, where the surface layer of soil thaws and is very saturated so moves down hill by heave and flow. |
